Balanced-cover support



e .A. BERSTED'ET AL I 1,767,730

'- BALANCED COYER- SUPPORT Fil ed'April 25, 1927 v' E: I E: 5 di "redBasia! 7 ,a rljn eraiea Patented June 24, 1930 PATENT eerie]:-

ALFRED BERSTED AND MARTIN BERSTED, OF CHICAGO, ILLINOIS BALANCED-COVERsurroa'r Application filed April 23,

This invention relates to a balanced cover support for lids ofphonographs and the like and concerns itself with novel mechanismincluding a balance spring which is adapted to be adjusted through therear wall of the cabinet. for varying the tension of the springaccording to the weight of the cover in order that the cover may bebalanced in any of its open positions; the spring being so connectedthat its resistance will vary according to the height of the cover abovethe phonograph top.

An object of the invention is to provide a balanced cover support fortalking'inachine cabinets or the like in which the cover may be balancedin any open position.

A further object'of the invention is to provide a balanced cover supportin which the balancing means may be readily adjusted through a wall ofthe cabinet.

A further object of the invention is to provide a balanced support forhinged lids which may be readily adjusted'to lids of various sizes andweights by manipulation of a single element. v r

A further object of the invention is to provide a'balanced coversupportwhich is eflicient in service and economical to manufacture.

The invention comprises the novel structure and combination of partshereinafter described and more particularly pointed out and defined inthe appended claims.

In the accompanying drawings which illustrate a preferred embodiment ofthis invention and in which similar reference numerals refer to similarfeatures in the different views:

On the drawings: I

Figure 1 is a fragmentary sectional view through a part of a phonographcase show ing one of the balanced supports connected to one end of thecover.

Figure 2 is a sectional view taken substantially upon the line IIII ofFigure 1.-

Figure 3 is a view similar to Figure '1 illustrating a slightmodification of the invention. I

As shown on the drawings; 7

Referring now to Figures 1 and 2 of the 1927. senaino. 185,939.

drawing, the reference numeral 1 refers to the rear wall of a phonographcabinet hav-' ing a motor-board 2 provided with a suit-' able slot 3adjacent one end of the cabinet; The slot 3 is closed'by a flange 4 on adepending bracket 5 which extends into the cabinet along one of the sidewalls as shown in Figure 2. The ends 6 of the flange 4 overlap the endsof the slot 3 and are secured to the motor-board by means of screws 7 orthe like. The flange 4 of the bracket is provided with a slot 8 throughwhich a link 9 passes. The upper end of the link 9 is pivoted to thecover 10 of the phonograph. The lowerend of the link 9 is pivoted at 9to one end of a lever 11 which in turn is pivoted at 12 to the bracket5. It will be noted that the lever 11 is substantially in the form of abell crank with the exception that the pivot point is at one end.The'lever 11 is provided with an ear 13 to which one end of a coilspring 14 is an chored. The other end of this coil spring is anchored toan ear 15 on one end of a lever 16 which is pivoted at one end to thebracket 5 as indicated by the reference" 17. The free end of the lever16 is substantially in the form of a segment provided with teeth 18which teeth coact with similar teeth 19 on a lever 20 which is pivotedat 21 to the bracket 5. It might, therefore, be said that the levers 16and 20 are intergeared the levers or members 16 and 20 have atoggle-like action. Above the pivot point 21 there-is an ear 22 on thelever 20. The bracket 5 is provided with an abutment 23 adjacent the ear22 and a'screw '24 extends through the abutment 23 and is threaded inthe ear 22; the head on the screw 24 is necessarily larger than the holein the abutment 23 so that thehead will abut such abutment. The rotationof the screw will obviously raise or lower the meeting ends of thelevers 16 and 20 andthereby vary the tension of the spring 14. It willbe noted that the rear wall 1 is provided with an opening 25 at thescrew head in order that a tool may be inserted therethrough forrotating the screw and adjusting the tension of the spring.

To limit the upward motion of the link 9 and the lever 11 a boss 26 isprovided on the lever 11 adjacent the pivot point '9, which boss 26abuts the shoulder 27 on the bracket 5 when the cover 10 is in theposition shown by the full lines in Figure 1. This boss 26 in abutmentwith shoulder 27 thereby prevents further elevation of the cover 10. Asafety lug or boss 28 is provided on the bracket 5 adjacent ,the pivotpoint 12 and will be abutted by a shoulder 29 on the lever 11 when thecover 10 is in its closed Osition as shown by the dotted lines inFigure 1. This lug 28 acts as a safety lug to pre vent the lever 11 andlink 9 from going beyond their desired positions when the de vice isinstalled, and further acts as a stop member or rest for the lever 11when the cover is in closed position and prevents the slamming of thecover 10.

In Figure 3 the link 9 that connects with the cover is also pivoted to alever 11 which pivots at 12 to a bracket 30 having a flange 31 at oneend by means of which it may be secured to the rear wall of thephonograph cabinet. The lever 11 in Figure 3 is connected by a springlet with a lever 16 as in Figure 1 and the lever 16 cooperates with alever 20 as in the first form. The lever 20 in Figure 3 is also providedwith an ear 22 for threaded relation with a screw 24: which extendsthrough a suitable aperture in the flange 31; aperture 25 being providedin the rear wall adjacent the head of the screw in order that the setscrew may be manually adjusted for varying the tension of the spring.The lever 11 is also provided with aboss 26 to abut the shoulder 27 onthe bracket 30, which bracket is also provided with a safety lug or boss28 so positioned as to be abutted by a shoulder 29 on the lever 11 whenthe cover is in closed position, substantially as previously described.

It will be noted that the structures shown in Figures 1 and 3 aresubstantially alike with the exception thatthe bracket 30 is attached tothe rear wall in Figure 3, while in Figure 1 the same is suspended fromthe motor-board 2. It will, of course, be understood that in both of theforms illustrated there will be duplicate supports on each side of thecover. 1

e are aware that many changes may be made and numerous details ofconstruction may be varied through a wide range without departing fromthe principles of this. invention and we, therefore, do not purposelimiting the patent granted hereon, otherwise than necessitatedby theprior art.

'lVe claim as our invention:

1. In a phonograph cabinet provided with a rear wall and a motor-board.a plate secured in said cabinet, a lever pivoted to said plate, a linkconnecting said lever with the cover and a pair of intergeared leverspivotally mounted onsaidbracket, a spring connecting said firstmentioned lever 'with one of said second mentioned levers, and meansoperable through the rear wall of the cabinet for adjusting one of saidinter-geared levers about its pivot.

2. In a phonograph cabinet having a. rear wall and a motor-board, abracket secured adjacent the motor-board and projecting within thecabinet, a link connected to the cover of the cabinet and extendingthrough said motor-board, a lever pivoted to the bracket and pivotallyconnected to the link, a pair of intergeared adjustable members on thebracket, a yielding means connecting said first mentioned lever, andsaidintergearcd members, and means operable through the rear wall of thecabinet for adjusting said members for varying the tension of saidspring.

3. In a phonograph cabinet having a rear wall and a motor-board, a coversupporting link extending through the motor-board, a bracket arrangedadjacent themotor-board, a lever pivoted to said bracket, said linkbeing connected to the free end of said lever, a coil spring connectedto said lever, an adjustable anchoringdevice for said spring, saidanchoring device comprising two mem bers supported on said plate forpivotal movement and having toggle-like action for varying the length ofsaid spring and means operable through the rear wall ofthe cabinet foradjusting said anchoring device.

4. A talking machine cabinet having a rear wall and a motor board,aplate secured to said cabinet adjacent said motor board, a

link connected to thecover of said cabinet I ing the free ends thereofprovided with teeth and in mesh with each other, a spring connected atone end to said lever and at the other end to one of said members, and ascrew connected to one of said members operable through the rear wall ofthe cabinet for oscillating the other of said members to varythe-tension of said spring. 7

5. A talking machine cabinet having a hinged lid, a plate secured insaid cabinet, a link connected at one end to said lid, a lever pivotedto said plate and to said link, two members pivoted at the outer endsthereof to said plate and with the inner ends in geared engagement, aspring secured to one end of said lever and at the other end to one ofsaid members, and a screw connected to one of said members for movingsaid members about the pivots thereof to vary the ten-- sion of saidspring.

6. A talking machine cabinet having a hinged lid, a plate secured insaid cabinet, a link connected at one end to said lid, a lever pivotedto said plate and. to said link, two

members pivoted at the outer ends thereof to said plate and With theinner ends in geared engagement with each other, a spring secured at oneend to said lever, and at the other end to one of said members, saidplate having an outturned ear thereon, a threaded ear on one of saidmembers and a screw in said ears for varying the angular position ofsaid members about the pivots thereof to vary the tension of saidspring.

In testimony whereof, We have hereunto subscribed our names.

ALFRED BERSTED. MARTIN BERSTED.

